beaman



5 Sheets-Sheet v1.

(No Model.)

. S. J. BEAMANK: J. DEAS.

I DESTRUCTOR FURNACE. N0. 574,774. Patented Jan; 5, 1897.

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S. J. BEAMAN &-J. DEAS. DESTRUGTORVFURNAOE.

No. 574,774. Patented Jan. 5, 1897.-

5 Sheets-Shed s; v

(No Model.)

S. J. BEAMAN 8v J...DBAS.

DESTRUGTO-R PU RNAGE.

' Patented Jan. 5,1897.

. b Sheets-Sheath. S. J. BEAMAN' & J. DEAS.

DESTRUGTOR FURNACE ('No Model.)

No. 574,774. Patented Jan. 5,1897.-

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lllllllll ll UNITED STATES SAMUEL JOHNSON BEAMAN AND JAMES DEAS, OF IVARRINGTON, ENGLAND.

DESTRUCTOR-FURNACE.

SPECIFICATION forming part of Letters Patent No. 574,774, dated January 5, 1897.

Application filed October 1, 1894. Serial No. 524,607, (No model.) Patented in England August17, 1893, No. 15,598,

December 9, 1893,1113. 23,712, and July 5, 1894-, No. 18.029.

To (all whom it may concern.-

Be it known that we,SAMUEL JOHNSON BEA- MAN and JAMES DEAS, citizens of the United Kingdom of Great Britain and Ireland, residing at Varrington, in the county of Lancaster, England, have invented certain new and use ful Improvements in Destructor-Furnaces, (patented in England August 17, 1893, No. 15,598, December 9, 1893, No; 23,712, and July 5, 1894:, No. 13,029,) of which the following is a specification.

This invention relates to destructors or furnaces for burning town refuse, market refuse, waste animal and vegetable matter, sludge, and the like.

In every form of the furnace constructed according to and for the purposes of this invention there is an inclined feeding-hearth in front, a furnace, a reverberatory arch extending over the furnace and the feedinghearth, a chamber, which may be a secondary combustion-chamber and which is formed by and between a fire-bridge and a perforated screen, together with the usual accessories, the various details being modified, as hereinafter described, for different purposes or uses. In some exceptional cases the chamber may be dispensed with.

' Ve will describe our said invention with reference to the accompanying drawings, in each of the figures of which similar parts are denoted by similar letters of reference.

Figure 1 is a vertical longitudinal section of the furnace as constructed and arranged for burning ordinary town refuse and other similar materials. Fig. 2 is a sectional plan of the same, the section being taken along the line 00 00. Fig. 3 is a vertical longitudinal section of the furnace as modified for the destruction by fire of market refuse, vegetable waste, and the like. Fig. 4 is a vertical longitudinal section of a modification of the furnace represented by Fig. 1. Fig. 5 is a front elevation of the furnace represented by Fig. 4. Fig. 6 is a vertical longitudinal section of afurnace as arranged for the burning of sludge and similar wet materials. Fig. 7 is a horizontal section taken along the linens (.0, Fig. 6.

As already described, the essential features of the construction and arrangement of the furnace are, commencing from the front, an inclined feeding-hearth G, a furnace B, and a reverberatory arch A, extending over the feeding-hearth and furnace. The products of combustion from the furnace may pass into and through a chamber J, which may or may not be adapted to produce secondary combustion. The gases issuing from the chamber may be utilized for generating steam, for drying, or other purposes, or they may be led to a chimney.

In the arrangement illustrated by Figs. 1 and 2, Ais the reverberatory arch; B, the furnace; O, the inclined feeding-hearth; D, the furnace-bars, which may be horizontal or inclined, but which are preferably horizontal,

as shown.

E is a parapet at the foot of the inclined hearth, acting as a'stop to the materials on the hearth; F, a hopper through which the materials are supplied to the hearth; G, a door giving access to the furnace; H, the firebridge; I, the perforated screen; J, the chamber formed between the fire-bridge and the perforated screen; K, a cavity formed in the fire-bridge when it is desired to produce secondary combustion in the chamber J. Air is supplied to this cavity through suitable passages, such as K K, formed in the side walls of the furnace, the heat of which is thus utilized. The air enters the chamber J through openings at the back of the bridge.

L is a steam-generator heated by the waste gases.

M is a conduit for the supply of air under pressure to the ashpit G and thence to the furnace.

N is a valve or damper actuated by the handle 0 for the purpose of controlling the air-supply. Natural draft may, however, be employed, if desired, but the forced draft gives much better results.

The chamber J is of great importance in dealing with infected bedding and clothing, which is inserted therein through a suitable door and is instantly consumed at a very high temperature, particularly when there is secondary combustion in this chamber. Also, the heat therein being found sufficient to melt copper, the chamber may advantageously be employed for the recovery of metals from old meat-tins and the like and for various other purposes. It may also be employed as a dustchamber, but when not required for any of these or other purposes it may of course be omitted.

Various means may be employed for the purposes of introducing air into the chamber for secondary combustion besides or in substitution for that described, as is well understood.

The perforated screen I is preferred to be behind the fire-bridge, as shown, and to have the perforations limited to about its upper half. When the chamber J is not used, it is preferred to employ the perforated screen at the back of the furnace, but we may use instead thereof a fire-bridge.

In the arrangement represented by Fig. 3 the lower half of the feeding-hearth is more horizontal, and it may be covered by the auxiliary perforated arch E, which stores the heat and assists the drying of the damp materials upon the hearth. The perforated screen I is shown as being in front of the firebridge, but these positions may be reversed.

The modification represented by Figs. at and 5 has the furnace-doors G at one side, a deeper chamber .I, and a flue P at the back for the passage of the waste gases to the chimney or elsewhere. G are ash-pit doors.

The furnace for burning sludge represented by Figs. 6 and 7 is constructed in such a manner that the hot gases therefrom can impinge upon the under side of the feedinghearth and thus promote the drying of the sludge thereon. After leaving the chamber J by the perforated screen the hot gases pass downward beneath the furnace and are then deflected upward by the dwarf wall R. After heating the hearth they pass down the other side of the wall and out by the flue P. o find it best to construct this hearth of castiron in segments or sections, as shown in Fig. 7, with Vshaped grooves, this giving a greater heating-surface for the sludge thereon. It is an advantage to produce a more active circulation over the inclined hearth in this case, and the means adopted for this purpose may also be applied to the other forms of the furnace. Passages (shown at S S by dotted lines in Figs. (3 and 7) may be formed in the side walls from near the upper part of the hearth to the secondary combustion-chamber, each passage opening above the hearth and into the chamber, respectively. The hot gases from the furnace thus pass upward along the surface of the material upon the hearth and through the passages into the chamber J, where the vapors from the sludge brought along by the gases are burned.

A modification of the means for supplying warm air to the cavity of the fire-bridge for secondary combustion is shown in Fig. 6 and can with advantage be used with the furnace there represented. The air enters by the pipe K, which has a zigzag course through the brickwork exposed to the hot gases, so that the air becomes thoroughly heated before arriving at the bridge-cavity.

In each form of the furnace the material is supplied at F in such quantity that this opening is kept practically closed while the furnace is working, and thus any escape of the hot gases is prevented in this direction.

The figures in all the represented modifications show a single furnace or cell only, but it will be understood that as many cells as may be desired may be grouped together in the usual manner. 4

Ilaving thus particularly described and ascertained the nature of our said invention an d in what manner the same is to be performed, we declare that what we claim is- 1. In a destrnctor-furnace, the combination of an inclined feeding-hearth, a furnace at the back of the hearth, an unperforated reverberatory arch extending over the f urnace and the hearth and means for directing the draft of the furnace away from the hearth, substantially as and for the purpose set forth.

2. In a destructor-furnace, the combination of an inclined feeding-hearth, a furnace at the back of the hearth, a secondary combustion-chamber at the back of the furnace, means for leading the draft through the combustion-chamber and from the furnace and an unperforated re\"erberatory arch extending over the hearth and furnace, substantially as described.

3. In a destructor-furnace, the combination of an inclined feeding-hearth, a furnace at the back of the hearth, a secondary combustion-chamber at the back of the furnace, means for leading the draft through the combustion-chamber and from the furnace, and an unperforated reverberatory arch extend ing over the hearth, furnace, and chamber.

42. In a destructor-furnace, the combination with an inclined feeding-hearth, of a furnace at the back of the hearth, a main unperforated reverberat-ory arch extending over the furnace and hearth and an auxiliary perforated arch, substantially as described.

In testimony that we claim the foregoing as our invention we have signed our names, in presence of two witnesses, this 23d day of September, 189%.

SAMUEL JOHNSON EEAMAN'. JAMES DEAS.

Witnesses:

SPENCER TALLHEAD,

inonen XV. ROWE.

ICC 

